package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Category;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;


@Slf4j
@Service
public class DishServiceimpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    @Override
    @Transactional
    /**
     * 新增菜品和对应的口味
     *
     * @param dishDTO
     */

    public void saveWithFlavor(DishDTO dishDTO) {
        //插入菜品数据
       Dish dish = new Dish();
       BeanUtils.copyProperties(dishDTO, dish);
       dishMapper.insert(dish);

       //批量插入菜品口味数据
       Long id = dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        for (DishFlavor df : flavors) {
            df.setDishId(id);
        }
        dishFlavorMapper.insertBatch(flavors);

    }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        //开始分页查询
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page =dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    @Override
    public void deleteBath(List<Long> ids) {
   //判断当前菜品能否删除--是否存在起售中的菜品？
        for (Long id : ids) {
            Dish dish=dishMapper.getbyId(id);
          if(dish.getStatus()== StatusConstant.ENABLE) {
              //当前菜品处于起售中，不能删除
              throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
          }
        }
        //判断当前菜品是否删除--是否被套餐关联
        //通过查询该菜品是否被某个套餐包含
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
         if(setmealIds.size()>0&&setmealIds!=null) {
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
         }
         //删除菜品表里的菜品数据
        for (Long id : ids) {
            dishMapper.deleteById(id);
            //删除菜品关联的口味数据
            dishFlavorMapper.deleteByDishId(id);
        }
       return;
    }
    /**
     * 根据id查询菜品和对应的口味数据
     *
     * @param id
     * @return
     */
    @Override
    public DishVO getById(Long id) {
        Dish dish=dishMapper.getbyId(id);
        DishVO dishVO=new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        //根据菜品id查询相关口味数据
        List<DishFlavor> flavors=dishFlavorMapper.getByDishId(id);
        //将查询到的数据封装到VO
        dishVO.setFlavors(flavors);
        return dishVO;
    }

    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        //修改菜品表基本信息
        dishMapper.update(dish);
        //删除原有口味数据
        dishFlavorMapper.deleteByDishId(dish.getId());
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors.size()>0&&flavors!=null) {
            for (DishFlavor df : flavors) {
                df.setDishId(dish.getId());
            }
        }
        //插入修改后的口味数据
        dishFlavorMapper.insertBatch(flavors);
    }

    @Override
    public void startOrStop(Integer status, long id) {
        Dish dish=Dish.builder().id(id).status(status).build();
        dishMapper.update(dish);
        //如果是停售，还应该把菜品关联的套餐停售
        if(status==StatusConstant.DISABLE) {
            List<Long> ids=new ArrayList<>();
            ids.add(id);
            List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
            if(setmealIds.size()>0&&setmealIds!=null) {
                for (Long setmealId:setmealIds){
                    Setmeal setmeal=Setmeal.builder().id(setmealId).status(StatusConstant.DISABLE).build();
            setmealMapper.update(setmeal);
                }
            }
        }
    }

    @Override
    public List<Dish> getByCategoryId(Long categoryId) {
        Dish dish=Dish.builder().categoryId(categoryId).status(StatusConstant.ENABLE).build();
        List<Dish> list=dishMapper.list(dish);
     return list;
    }
    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;

    }

}
